Lift pump



Aug. 16,1932. M B 1,871,577

LIFT PUMP Filed May 6. 1930 INVENTOR Y. fjaZi/z ATTOR N EY Patented Aug. 16, 1932 UNITED STATES MAURICE J. ."BABIN', OF NEW YORK, N. Y.

LIFT

Application filed May 6,

This invention relates generally to the class of pumps, and refers more particularly to lift pumps which are designed for various purposes, such as for bailing boats, pumping out the contents of oil drums, molasses barrels, or other analogous uses where a simple, inexpensive and efficient pump of this nature may be employed.

The primary aim of the invention is to provide a novel and improved lift pump which employs few and simple parts, which may be inexpensively constructed and assembled without sacrificing efficiency in the finished product, and wherein the same as a whole may be economically produced.

One of the outstanding objects and advantages derived from the present invention resides inthe formation of a plunger rod and handle and a plunger valve mounting from a single length of wire or equivalent material, and wherein the valve mounting at the lower end of the plunger rod is fashioned so as to fulcrum and limit the valve both in its upward and downward movements.

As a further feature, the invention includes a pump barrel and plunger rod, which use, and in which the cooperative portion of the barrel acts to inherently reinforce the The invention further contemplates a lift pump having side inlet'ports adjacent the lower end of the barrel, and in which said lower end is closed to limit the downward movement of the plunger for preventing its'displacement through the lower end and possible damage of the valve or its mounting by contact with objects outside: of the barrel. 7

, As a still further object the invention comprehends in a lift pump, an improved outlet spout which is constructed in such a manner as to obtain maximum strength while allowing for free egress of the fluid being pumped therethrough. V

With the above recited and otherobjects in view, reference is had to the. following de- PUMP 1930. Serial No. 450,261.

scription and accompanying drawing, in which there is exhibited one example or embodiment of the invention, while the claims define the actual scope of the same. I

In the drawing: Figure 1 is a vertical sectional view through a lift pump constructed in accordance with the invention. I V

Figure 2 is a front view of the pump illus-, trating the outlet spout in cross section along the line illustrated, at 22 in Figure 1.

Figure 3 is a fragmentary top plan view of the pump illustrating the interengagement of the cooperative portions of the plunger rod and barrel to retain the same against relative movement when the pump is not in actlve use. 7. Figure 4 is an enlarged fragmentary vertical sectional view particularly illustrating the plunger valve and its mounting and dis- 0 closing in full and dotted lines the raised and lowered positions of the valve. 7 Figure 5 is a similar view taken approximately on the line 55 of Figure 4: and in a plane at a right angle thereto.

Referring to the drawing by characters of reference the pump includes a pump barrel designated generally by the reference character A, and a plunger which is designated generally by the reference character 13. The barrel 'A consists of an elongated tubular section or cylinder 10 and a substantially frusto-conical head 11, the reduced lower end 12 of which is suitably joined to the upper end 13 of the cylinder 10 and extends upwardly therefrom in axial prolongation thereof. The upper end 14 of the head 11 is circumferentially fluted or crimped for the purpose of reinforcing and strengthening the upper end without resorting to the use of a rolled bead and a reinforcing wire therein, as is usually employed. The fiuting or crimping further presents a circumferential series of internal vertical grooves or recesses 15, the purpose of which'will hereinafter appear. The head 11 of the pump barrel A is further pro= vided intermediate its upper and lower ends with a side-outlet opening 16, from which thereprojects an outlet spout 17 which communicates with and is joined to the head 11 in any desired manner. As illustrated, the outlet spout is formed with a nozzle or mouth portion 18 which is directed downwardly at an angle and which is of gradually decreasing size or cross sectional area from its juncture with the main portion of the outlet spout to its outlet'end. "Itwill also be observed *that the main portion 17 of the spout isofgradually increasing sectional areafrom-its juncture with the mouth or nozzle 18 to its opposite end and said portion 17 from a point closely adjacent its juncture with the head 11 strengthen the structure and add to its rigidity. The lower end of'the cylinder portion 10 ofthe pump barrel B is closedby a bottom cap 20, and adjacent the lower'end said cylinder portion is formed with circumferentially spaced side inlet ports21. r

The plunger designated generally lthe referencecharacter B includes a plunger rod 22 and a valve 23, the latter being of a shape or area conforming substantially toithe cross sectional shape and size of the cylinder, portion 10. The plunger rod 22 is preferably formed from a single length of wire or equivalent material, the lower end of which is so fashioned as to provide a horizontally disposed bearing terminal 24, upon which the valve 23 is mounted to swing from a horizontal active position illustrated in dotted lines inFigure 4 to a vertical inactive position illustrated in full lines in Figure 4, or vice versa. Thevalve 23 maybe mounted on the bearing terminal 24 in any'desi'red manner, but as illustrated, this is accomplished by providing spaced parallel slits 25in the valve 23 at apoint disposed at one side of'the' axial center thereof, and the portion 26 lying between the slits 25 is oilsetin an opposite direction to the portions 27 0f the valve 23 whichlie between the slits and the marginal edge of the valve 23. Between'the main length of the plunger-rod 22 and the horizontal bearing terminal 24, the wire or stock from which the plunger rod is' formed is fashioned into a substantial S shaped or compound twisted portion 28 presenting oppositely directed-bights'29 and 30; the'former presenting alimiting stop with :which' the va1ve23 engages as 'it swings to its vertical full'line position illustrated in Figure 4. The latter bight 3O coactswith the tail portion 31 of the valve 23 to act as a limiting stop for the valve as itswingsto the horizontal dotted line po- 7 sitiion in Figure i. Due to the eccentric disposition of the horizontal bearing terminal with respect to the axial center of the valve 23,"it is apparent that the'valve'is thus fulrcrumed to normally gravitate to the horizontal position illustratedin dotted lines in Figure l, andis hence prevented from moving downwardly" beyond said horizontal pos1t1on by the engagement of the tail part 31 with the of the pump barrel is angulated as at 19 to l bight 30, when the same is moved upwardly to lift the column of water or other liquid be- 7. The upper end of the plunger rod 22 is provided with laterally bent or offset handle portion 32, the free extremity 33 of which portion 32 is bent or directed downwardly, the terminal, 33 being spaced from the main portion of the rod 22 a distance which is substantially equal to'the distancebetween' the walls of twoof the diametrically disposed groovesld-formed by theflutedupper end 14 of the barrelhead 11.. This constructionprovides a manipulatinghandle for the plunger whilepermitting of the frietionalengagement of the handled upper end of the plunger within the fluted upper end of the pump bar-v rel headfas illustrated in Figure 3, by virtue of which the handle may be retained against relative movement with I respect to barrel when the pumpis not in active use. Obviously, the frictional engagement is accomplished due-to the more or'less resilient nature-offthe material from which theiahandle and pump barrelis formed. 7 v r In use and operation, with the parts ingthe positionrillustrated in Figure 1, it is apparent that the upward movement of the plunger B a liquid column trapped in the cylinder porindicated by the arrow'wi-ll function :tolift tion--10 above the valve 23,-whi'le downward movement will, due to the eccentric-mounting of the valve 23, cause said valve-to swing .to the full line position illustrated in Figure 4, for downward passage through the column of'liquid in the lower-end ofthe Cylinder-portion 10,0fi'ering a minimum-resistanceto the liquid through which it is passin WVhenthe plunger reaches. the lowermost extent ofthe stroke, the valve. 23 will swing downwardly to itshorizontal dotted'lineposition, as illustrated in Figure 4, at-the beginning ofsthe next-up stroke, for again lifting the column of water trapped thereabove in the cylinder portion. Due to the fact that the lower end of the'barrel isxclosed by the closure cap or bottom wall 20,,itis apparent that the down stroke of the plunger is limited by contact therewith to prevent displacement of the same through the lowerend ofthebarrel and the causing of .possible damage to the valve by contact with objects ,outsideof the barrel.

"From the foregoing, it will thus be seen that a lift pump has been devised-which employs. few and simple parts capable of being inexpensively constructed and assembled, whereby the pumpmay be economically produced without sacrificing the efiiciency of the finished product. It willbe further observed that in the present instance, the plunger construction employs the valve 23 both in the capacity of a plunger head and a flap valve, thereby materially reducing the parts in this respect.

l Vhile there has been illustrated a preferred embodiment of the invention by way of exam;- ple, it is to be clearly understood that no limitation is intended to the precise structural details, and that variations and modifications which properly fall within the scope of the appended claims may be resorted to when found expedient.

What is claimed is:

1. In a lift pump, a plunger including a flap valve element and a plunger rod, said plunger rod being formed from a single length of stock of uniform thickness throughout its entire length and bent at its lower end to provide a horizontal bearing terminal upon which the flap valve element is swingably mounted, said lower end having a bent portion between said terminal and the remainder of the plunger rod to provide a pair of bights with which the valve element respectively engages to limit its swinging movement in opposite directions.

2. In a lift pump a plunger including a flap valve element and a plunger rod, said plunger rod being formed from a single length of stock bent at its lower end to provide a horizontal bearing terminal upon which the flap valve element is swingably mounted, said lower end having a portion formed between said terminal and the remainder of the plunger rod to provide means element and a plunger rod, said plunger rod formed from a single length of stock fashioned at its lower end to provide means for fulcruming the valve element for limited movement and fashioned at its upper end to provide a manipulating handle for the plung er and frictionally cooperative portions at the upper ends of said pump barrel and plunger rod for retaining the same against relative movement when the pump is not in active use, said cooperative portions consisting respectively of a fluted upper end of the pump barrel defining internal axially disposed circumferentially arranged grooves and a laterally bent upper end of the plunger rod formed with a depending free terminal substantially parallel to and spaced from the plunger rod a' distance approximating the distance between the outer walls of a pair of diametrically disposed grooves formed by the fluted portion of the pump barrel.

4:- In a lift pump including a pump barrel plunger including a flap valve element and a v plunger rod, the latter being constructed from a single length of stock fashioned at its lower end to provide a horizontally disposed fulcrum upon which the valve element is mounted for movement from a vertical to a horizontal position, said plunger rod being shaped at its upper end to provide an angulated handle portion having a depending free yieldable resilient terminal disposed parallel to the plunger rod and spaced therefrom an appropriate distance to permit of the frictional engagement of the upper end of the plunger rod within the fluted upper end of the pump barrel whereby to retain the plunger and barrel against relative movement when the pump is not in activeuse.

5. A plunger for lift pumps including a valve element and a plunger rod fashioned from a single length of stock of uniform diameter throughout its entire length and formed at one end to provide a bearing terminal perpendicular to the major portion of the plunger rod, upon which bearing terminal the valve element is fulcrumed for swinging movement, said plunger rod at its juncture with the terminal having a portion bent upon itself to provide upper and lower bights for respectively limiting the swinging movement of the valve element in opposite directions.

6. A plunger for lift pumps including a valve element and a plunger rod fashioned from a single length of stock of uniform diameter throughout its entire lengthand formed at one end to provide a bearing terminal perpendicular to the major portion of the plunger rod, upon which bearing terminal the valve element is fulcrumed for swinging movement, said plunger rod at its juncture with the terminal having a portion bent upon itself to provide upper and lower bights for respectively limiting the swinging movement of the valve element in opposite directions, said valve element having spaced parallel slits eccentric to its axis and offset between the slits to provide a bearing portion receiving the bearing terminal of the plunger rod.

MAURICE J. BABIN. 

